GB522651A - Improvements in or relating to optical objectives - Google Patents
Improvements in or relating to optical objectivesInfo
- Publication number
- GB522651A GB522651A GB3680938A GB3680938A GB522651A GB 522651 A GB522651 A GB 522651A GB 3680938 A GB3680938 A GB 3680938A GB 3680938 A GB3680938 A GB 3680938A GB 522651 A GB522651 A GB 522651A
- Authority
- GB
- United Kingdom
- Prior art keywords
- collective
- component
- components
- dispersive
- taylor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
522,651. Lenses. TAYLOR, TAYLOR & HOBSON, Ltd., and WARMISHAM, A. Dec. 17, 1938, 36809. [Class 97 (i)] In a photographic objective comprising two compound dispersive meniscus components having facing concave surfaces and disposed between a front collective component and a pair of rear collective components, the refractive indices of the front element of the front dispersive component, of the rear element of the rear dispersive component, and of the front member of the pair of collective components, are greater than 1.63, and the two rear collective components have their shallower surfaces facing the front. The power of the rear collective component may be not less than 40 per cent. of the power of the whole objective, not greater than 70 per cent. thereof. The radius of the shallower surface of the rear collective component may be greater than three times the equivalent focal length of the whole objective, and may be positive or negative. Data for one example are set out in the Specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3680938A GB522651A (en) | 1938-12-17 | 1938-12-17 | Improvements in or relating to optical objectives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3680938A GB522651A (en) | 1938-12-17 | 1938-12-17 | Improvements in or relating to optical objectives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB522651A true GB522651A (en) | 1940-06-24 |
Family
ID=10391349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3680938A Expired GB522651A (en) | 1938-12-17 | 1938-12-17 | Improvements in or relating to optical objectives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB522651A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2718173A (en) * | 1950-09-26 | 1955-09-20 | Cycloptic Anstalt Fur Optik Un | High intensity five component photographic objective |
| US2894431A (en) * | 1957-08-08 | 1959-07-14 | White Rodgers Company | Optical objective |
| US2895379A (en) * | 1955-12-30 | 1959-07-21 | Taylor Taylor & Hobson Ltd | Optical objectives |
| DE1102434B (en) * | 1955-01-03 | 1961-03-16 | Canon Camera Company Inc | Photographic lens Gaussian design |
| US3012476A (en) * | 1957-08-24 | 1961-12-12 | Leitz Ernst Gmbh | Photographic objective |
-
1938
- 1938-12-17 GB GB3680938A patent/GB522651A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2718173A (en) * | 1950-09-26 | 1955-09-20 | Cycloptic Anstalt Fur Optik Un | High intensity five component photographic objective |
| DE1102434B (en) * | 1955-01-03 | 1961-03-16 | Canon Camera Company Inc | Photographic lens Gaussian design |
| US2895379A (en) * | 1955-12-30 | 1959-07-21 | Taylor Taylor & Hobson Ltd | Optical objectives |
| US2894431A (en) * | 1957-08-08 | 1959-07-14 | White Rodgers Company | Optical objective |
| US3012476A (en) * | 1957-08-24 | 1961-12-12 | Leitz Ernst Gmbh | Photographic objective |
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